Ventilating device



E. J. KRUEGER VENTILATING DEVICE Oct. 14 ,-':924.

192] 2 Sheets-Sheet.

Filed May 14 vINVENTOR. y

M my E l Oct. 14 1924,

E. J. KRUEGER VENTLATING DEVICE Filed May 14 192,1 2 Sheets-Sheet 2INVENTOR.

ET WVM f TTORNEY.

Patented Get. 14, 1924.

UNITED STATES EDWARD J. KR'UEGER, OF MILWAUKEE, WISCONSIN.

VENTILATING DEVICE.

Application filed May 14, 1921.

T o @ZZ w hom t may conce/m:

Be it known that I, EDWARD J. KRUnsER, a citizen of the United States,and resident of Milwaukee, in the county of Milwaukee and State ofWisconsin, have invented new and useful Improvements in VentilatingDevices, of which the following is a description, reference being had tothey accompanying drawings, which are a part of this specification.

This invention relates to certain new and useful improvements inventilators and refers more particularly to a device designed forplacement at the discharge end of a shaft and operated by the aircurrents to create a positive suction at the shaft mouth.

It is one of the objects of this invention to provide a device of theclass described so designed and constructed as to insure the productionof a maximum suction at the air shaft mouth with a minimum amount of aircurrents for the operation thereof.

The various devices of this character that have heretofore been devisedprevent the commercial success thereof due to their excessive cost ofproduction and hence it is another object of my invention to so designand construct the parts thereof as to permit the quantity productionthereof with the least amount of expense and workmanship.

It is a further object of the present invention to provide an improvedmanner of mounting the shaft of a ventilator whereby the same is capableof free rotation and will require the attention of an attendant only atlong intervals, the bearings working within cups or containers for thereception of lubricant.

A still further and more specific object of my invention is to providean improved form of vane for a device of the class described, wherebymaximum efliciency is obtainable as well as requiring a kminimum amountof work and materials in connection with their production.

With the above and other objects in view which will appear as thedescription proceeds, my invention resides in the novel construction,combination and arrangement of parts substantially as hereinafterdescribed and more particularly defined by the appended claims, it beingunderstood that such.v

changes in the precise embodiment of the herein disclosed invention maybe made as come within the scope of the claims.

In the accompanying drawings, I have Serial No. 469,424.

illustrated one complete example of the physical embodiment of myinvention constructed according to the best mode I have so far devisedfor the practical application of the principles thereof, and in which:

Figure l is a view part in section and part in elevation illustratingthe upper discharge end of an air shaft equipped with my improveddevice;

Figure 2 is an enlarged detailed sectional view illustrating theconstruction of the form of top bearing I provide for the upper end ofthe journaled shaft;

Figure 3 is a top fragmentary View taken on the plane of line 3 3 ofFigure l', parts thereof being broken away and in section to moreclearly illustrate structural details;

Figure 4 is a fragmentary detailed view taken transversely throughFigure 1 ony the plane of line 4 4, and

Figure 5 is a fragmentary perspective View illustrating the manner ofsecuring the lower ends of the vanes to the lowermost ring member.

lt will bereadily appreciated by those skilled in the art to which aninvention of this character appertains that my device is capable of usein connection with ventilating shafts, chimneys, or any other shaftswhere it is desired to create a suction'or draft therein. ings aconventional shaft 6 is illustrated in the mouth or discharge end ofwhich a spider bracket member 7 is secured by fastening members 8, whichalso serve to secure bracket arms 9 to the outer opposite sides of theshaft.

The bracket arms 9 have their outer end portions directed upwardly as at10 and have secured thereto the lower ends of support-ing arms l1, whichare preferably formed of flat stock, twisted one half turn to impartadded strength thereto and have their upper ends secured to an upperspider bracket 12.

The spider 7 is formed with a centrally bored upstanding projection 13preferably in axial alinement with an axis of the shaft 6 and hassecured therein a cupshaped member 14 which provides the lower ball racefor the lower bearing of a shaft 15 the other ball race being formed byan end vthrust member 16 mounted on the adjacent shaft end.

The bore of projectionvln is enclosed by a cap or cover 17 to preventgrit or other forln the accompanying drawf eign matter lfrom `disturbingthe bear-ing which is. providecl-with lubricant "by filling theprojection bore. The bearing isadjusted j by a set screw 18 which`passes throughthe spider 7 and engagesflthe bearing `part`14 as clearlyillustrated in figurep-1,.t-he l'set screw being made fast in itsposition of adjustment by a lock nutr19.

The upper end of the shaft is also pro- Vvided withr-faf"ballVybearing.positioned within a z cup: shaped 1part-:2O,fformed on thespider 112 nandiinto "which the shaft 415 .eX-tends through fan opening21. The end `.of lthe 'shaft 15 extendingfinto;'projection-2O -isslightly 'reduced'ras at 22-;:and has mounted' thereon -1 a5v:liar-.dened 'collar 1.23,"f-which4 `.with a collar 24 `formsfa fballyracefor bearings i 25.

'The collars 23 and 24 are'securedftogether with ythe."hearings25Itherebetween'- by afring 26 #which has. its IeClgr-is directedinwardlywasY at '27 to :.c'l'ampl safidf'coljlarsJ ftherebet-ween. The

bearing j ust described 'is retained' within-therecess#offprojectionf'20fby asleeve `28, set

within the-"bore thereofwandheldin engage- Anientwit'hf'the upperportion of ring 26fby a .cover 129 "which closes the pr'ojecti'on'bore.f'lhe 'coyer-.`29""i`s 'removably secured `-in position ,by fasteningand'is apertured -to receive a plug 31 provided wvitha 'channel:th-rough "which'f'the" interior f of" the :proj-jefction y 2O issupplied *with* ilubricant, the vchannel{32fbeingnormally closed-by acap 33 which prevents the .entra-n'ce'of-foreignvmatterfinto-thefbearing. 4rlhe lubricant is retained within thefprojection 20 by apachingring 34 illustrated el'evation-,in'frure i11,-"surrounding -thershaft and set within za gcounterbored recess 35`within -the ybottom l -.thereof.

From lthe foregoingrdescriptionit will lbe rreadily*seen thattheshaft 15"is-provided'- with; strong-.bearings capable of adjustment vtoaccommodate'for wearfandfat t'hesame time' capable'k offree rotationwith the least amount-'kof :'friction. 'Illiefshaft E15 carriesV aplurality of vanes 36, to be later described9 fjthe -Yuppercends Aofwhich are supported `vfrom, a-fdisczmember 37 and thelower endssof"which-faresecured toa ring-'member 38. Thefdisc 37 iscentrallyaperturedand enga'ged over-the reduced-threaded end 39 of lacollar 40f-madeifast to the upper portion iofzshaft 15:, thediscVbei-ng" firmly secured-in place by a binding nut 41 in threadedengag'ement with the'part 39.

Al'ring 42 of a 'diameter'l equal to the diam- *43s'ecured in yspacedrelation tothe inner (soI . periphery thereof :and which register withitl'ie-apertures ofthe disc 37 and in lthe upper laterally" flangedportion-44 ofv a cone mem- Yberif45 to receive Vfastening bolts '46.Thel lower end of the cone member 45 isf-madefastv to the shaft at a4point near its center iby a `collar 47. The -member -45 braces the vanestructure and by rea-son off its shape preventsthe 'formationwof -airypockets and eddying currents in the space between the vanes. It will benoted that the collars 40 'and'47 adjustably'support the conical member45,-and the vanes fastened. to the ring carried by the disc 37 as anentirety, on the shaft 15, thus permitting ready adjustment of thedevice in assembling. Variations in the distance fromthe-top `of theairshaft to the bracket member 7 are yalso taken care of byl thisadjustable feature.

The lower ring 38'surrounds-'thet mouth :ofthe shaftbwith itsuppermostedge posivtioned thereaboveand its lowerinost edge therebelow, andlthesame is retained concentric with theair shaft mouth, by-spolres48'having their outer endsmade fast-:to `the ring 38 and their innerends secu-red toma vwasher or-plate 49. Each lvane 36 is'forined `from alength-of metal, one longitudinal edge of which is curledl about aVreinforcing wire v=asat 51, whereby a gutterfis provided for directingymoisture which vmay ...gather thereonV downwardly v `below the vairshaft mouth. "Each vane is centrally longiytu'dinallyribbed as aty52fand has its upper -endspot-welded to thel outer face of ring42 a-ndits lower end spot-welded atene corner 53 to the ring 38, the othercorner 54 being struck outwardlyr and a'perturedto receive a reinforcingwire 55. c

The vanes are medially bracedfby areinforcing wire :56 passedtherethrough 'whereby an additional factor of--safety fisobtained. Fromlexperiencey I have foundf that finaximum -eiiicien'cy is .obtainedfbyhaving the .upper portion of the vane curved andthe lower lendy formedon-a straight `line -in-` lclinedr'downwardlyand inwardly withrefspect-.to-'theaXis of thef-.shaft-15.- 'The'fupe jperzends of thevanesfare" preferablyy overlapped` whereby the elementsare restrained-f-rom entering the mouth :of the shaft=asfwill be readily obvious.

'From the lforego-ing description taken-in connection with theaccompanying'fdrawvings, vit will be readily obvious `Eto those skilledin the art,fto-which yanfinvention of this character appertains, thatl'provide a ventilating `device which willbe capable of Vadaptation toVentilating shaftsofallsizes and kinds,-and-which will operate-.inafh-i-glr ly satisfactory manner and require `a'si'nall arno-unt 'offattention -on the fpartf of-'%an attendant.

-What I claimesmy invention is: l

1. In adevicef-of the class described,va j ournaled shaft, adiscmember-adj ustably secured -to therupper portion of-said shaft andhaving spaced openings therein near vits periphery, a ring,aperturedvlugs' on thef-in- -ner periphery ofthe ring -in fregistervwiththe openings -of'said vdisc member, ay cone member having its lowerendadjustably se- 'cured to said shaft and its upper end strucklaterally and having openings therein registering With the openings ofsaid disc member and ring lugs, fastening means engageable in theregistered openings, and vanes suspended from said ring.

2. In a device of the class described, a bearing unit comprising ab-racket having a counter-bored projection, a rod projectable in saidbore, a sleeve engageable over said rod part in said bore, a ring ofsubstantially right-angular shape in transverse section, ball bearingsconfined between said sleeve and ring, a collar member disposed in saidbore and engaging the bearing formed by said sleeve and ring, a coverfor said bore and engaging said collar member to retain the same inengagement With the bearing, said projection having a counter boredrecess at the point of entrance thereto of said rod, means permittingthe supplying of lubricant to said bore, and a felt Washer in saidrecess and surrounding the rod to prevent leakage of lubricant out ofsaid recess.

3. In a device of the class described, comprising an air shaft, abracket ositioned above the mouth of said shaft an having a recesstherein in axial alinement With the shaft, a spider member secured tothe air shaft and having a bearing recess therein in axial alinementWith the recess in said bracket, a shaft journaled in the recesses ofthe bracket and spider members, a collar secured to the journaled shaftadjacent the upper end thereof, a reduced and threaded portion on theupper end of said collar, a centrally bored disc having a plurality ofapertures around its periphery, said disc being positioned on saidcollar With the threaded top portion thereof extending through thecentral bore of the disc, a binding nut threaded on said collar threadedportion and adapted to secure the disc mem ber on said collar, a Sleevering, apertured lugs on the inner periphery of the ring in register withthe apertures of said disc, an inverted cone member having its baseflanged laterally and apertured in alinement With the apertures of thedisc and lugs, means binding the disc, ring and cone member through saidapertures, a. second collar secured to said journaled shaft having theupper portion of its bore flared to receive and firmly secure the apexof said cone member, and vanes carried by said ring.

In testimony whereof, I affix my signature.

EDWARD J. KRUEGER.

